SAN FRANCISCO (Reuters) - Adobe Systems Inc. unveiled on Sunday video-player software that lets consumers play back video online or offline, a move that could help reshape an acrimonious debate over video-sharing.

Adobe Video Player builds on the leading design software maker's Flash player, already the dominant technology used to stream video online by sites ranging from YouTube to MySpace to MSN to Yahoo Video.

The video player is due to become available to consumers over the next several months, Adobe officials said....